I'm trying to think of ways to defend my LEGO castle. Is there a way I can shoot some flaming arrows into the hearts of the invaders? Maybe some burning oil?
Burning oil is the easier of the two, since the basic flame elements
can connect into a realistically looking stream of liquid fire:
Depicting individual arrows is a lot harder due to the absence of a single arrow piece (aside from the proportionally way oversized harpoon piece), and adding a flame piece is even harder. Your best bet would probably be adding a flame piece, any of the several sizes available to a shield:
Or use a flame piece with a shaft as a combined arrow and flame:
But if 3rd party pieces are not out of question, you can get some convincing results, in this case with Brickarms arrows: